Hallgrim and Marie attend a conference in Sweden where they locate the person behind the Lithuanian sex trade. A price is put on Hallgrim's head, and someone comes to collect.

Hallgrim continues his hunt for Benjamin Stern who is deeply involved in the blood diamond trade from Congo. Michael finds an e-mail on Benjamin's computer to Le Mabë who is wanted in connection to war crimes. The mail also refers to two Congolese women who have sought asylum in Denmark, both of whom have been subjected to cruel rapes. Meanwhile, Hallgrim starts up a romance with a Swedish Flight Attendant.

Hallgrim and his Swedish colleague Rydén set up a giant sting to catch a well-known and totally ruthless drug dealer who has avoided capture for years.

The murder and abuse of a little girl in Stockholm lead Hallgrim and his team to a world-wide paedophilia network and a mysterious man who calls himself "The Groom".